Joint for articulated locomotives.



S. M. VAUCLAIN. JOINT POR ARTIGULATBD LOGOMOTIVES.

APPLICATION FILED DEO. 18, 1913.

Patented June 2, 1914.

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S. M. VAUGLAIN. JOINT PoR ARTIGULATED LoooMoTIVEs.

APELLQATION IILED DBO.18, 1913.

Patented June 2, 1914.

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f n I r l l I I l UNITED sTATEs PATENT oEEicE.y

SAMUEL M.. VAUCLAIN, OF PHILADELPHIA, PENNSYLVANIA, ASSIG-NOR T0 THEBALD- WIN LOCOMOTIVE WORKS, 0F PHILADELPHIA, PENNSYLVANIA, A CORPORATIONOF PENNSYLVANIA.

JOINT FOR ARTIGULATED LOCOMOTIVES.

Specification of Letters Patent.

Patented June 2, 1914.

To all whom t may concern Be it known that I, SAMUEL M. VAUCLAIN,

a citizen of the United States, residing in l cured to the forward frame2, and formed in Philadelphia, Pennsylvania, have invented cert-ainImprovei'nents in Joints for Articu- 1 lated Locomotives, of which thefollowing is a specification.

My invention relates to certain improvements in locomotives of theMallet type, in which two frames are pivotally connected, each framehaving its own motive power and a boiler extending over both frames.

r1`he object of my invention isto improve the construction of the jointor coupling which connects the two frames, so that the 'ralncs will havean independent vertical movement with respect to each other, as well asa lateral movement on the pivot pin.

In the accompanying drawings -Figure 1, is a sectional plan viewillustrating my invention located between the two frames of a locomotiveof the Mallet type; Fig. 2, is a longitudinal sectional view `on theline lf-a, Fig. 1; Fig. 3, is a perspective view of the coupling; Fig.4, is a perspective view of the ball and sockets; Fig. 5, is aperspective view of`the pivot pin; and Fig. 6, is a diagrammatic Viewillustrating in outline a Mallet locomotive to which my invention isapplied- Referring to the drawings, 1 is the rear frame of thelocomotive and 2 is the forward frame.

3 is the boiler which extends over both frames.

4, 4 are the driving wheels; one set of driving wheels being locatedunder one frame and the other set being located under the other frame.These two trames are pivotally connected and, in some types oflocomotives, the boiler is xed to one tramo and is arranged to` swingover the other frame. Usually, the pivot consists ot two parts with avertical pivot pin connecting the parts so as to allow the frames toaccommodate themselves to the curve of the track.

It has been found in grades or uneven tracks that considerable strain isplaced upon the parts of the coupling and, in some instances, theseparts are liable to fracture, especially when one frame strikes thegrade in advance of the other and, in order to allow the two frames tohave independent vertical movement, as well as lateral movement, I

-provide an improved coupling which I will now proceed to descrlbe.

5 1s a casting, 1n the present instance sethis casting are the bearings6 in which is secured a transverse pin 7. Mounted on this pin 1s thecoupling member 8 having two extensions 9 through which the pin 7 passesso that the said coupling is free to swing vertically on the pin 7.

In the outer end of the coupling member 8 1s an opening 19 for thereception of a twopart socket 10 shaped to tit a ball 11, which 1smounted on a vertical pin 12 extending through the bearings 13 in acasting 14 secured, in the present instance, to the rear frame 1. Thecasting 14 is formed to receive the socket end ot' the coupling 8 andhas check pieces 18, which are spaced apart sufficiently to allow for alimited movement of the coupling member on the ball.

The pin 12 has a head 15 and is inserted in the bearings 13 and ball 11from the linderside and secure-d in position by a transverse bolt 1G,which extends through lugs 17 on the underside of the casting 14.

It will be seen by the above construction that I am enabled to make acoupling or `joint which connects the two frames of a Mallet locomotive,so that cach frame will have an independent vertical movement and willalso have an independent lateral move' ment, and the ball willaccommodate itself to any inequalities of the track so that neitherframe will be subjected to torsional strains.

1. The combination in a. locomotive, of two frames; a horizontal pivotpin carried by one frame; a coupling member pivotally mounted on saidpin; anda universal coupling including a vertical pivot pin connectingthe coupling member to the other frame.

2. The combination in a locomotive,of two frames; atransverse pivot pinon one frame; a vertical pivot pin on the other frame; a couplingmounted on the transverse pivot pin of one frame and having a socket;and a ball mounted in the socket and having an opening therein for thepassage yof the vertical pivot pin. 4

3. The combination in a Mallet locomotive, oftwo frames arranged one inadvance vof the other, u boiler extending over both frames; :1 castingsecured to the forward frame and having bearings; a transverse pivot pinmounted in the bearings; a, coupling having two extensions formingbearings through which the pivot pin passes; a centrally located socketon the coupling; a bull mounted in the socket; a casting secured to theother :trame and having bearings and cheek pieces; and a vertical pivotpin mounted in thek bearings and extending

